Miller Big Blue 300 PRO Series User Manual

 Complete Parts List is available at www.MillerWelds.com
OM-259 355 Page 45
8-8. Kubota Engine Speed Adjustment
803 581−D
3
1
2
! Stop engine and let cool.
Engine speed is factory set and should not
require adjustment. After tuning engine,
check engine speed with tachometer or fre-
quency meter. See table for proper no load
speed. If necessary, adjust speed as fol-
lows:
Start engine and run until warm.
Turn Process/Contactor switch to Stick −
Weld Terminals Always On position.
1 Lock Nut
2 Adjustment Screw
Loosen nut. Turn screw until engine runs at
weld/power speed. Tighten nut.
 Do not set engine speed higher than
specified.
3 Engine Stop Lever
Use lever to stop engine if Start/Preheat
switch does not work.
! Stop engine.
Close door.
Stop
Tools Needed:
RPM (Hz)
Engine Speed
(No Load)
Weld/Power
1850 (61.6)
Maximum
8-9. Mitsubishi Engine Speed Adjustment
NOTICE − Engine speed is not adjustable. Attempting engine speed adjustment may affect warranty.

Miller Big Blue 300 PRO Series Specifications

General

Engine Power	24.8 hp (18.5 kW)
CC/CV	Yes
Frequency	60 Hz
Protection Class	IP23
Duty Cycle	100%
Generator Output	10, 000 Watts Peak, 9, 000 Watts Continuous
Welding Amperage Range	30-300 A
Output Current Range	30-300 A
Welding Processes	Stick (SMAW), TIG (GTAW), MIG (GMAW), Flux-Cored (FCAW)